 ()
    , , ;
    = ("");
    = 
   "//{{()
   |    ;
   | ;
   | ;
   | = ..;
   | = ..;
   | = .., .., ..;
   |  = ();
   |  = ();
   |  = (()-());
   |    .;
   |(  );
   |"//}}
   ;
        .() = 0 
      ;
   ;   
      . (,0,1);
         .(""); 
         .("") = 1 
 //     2 ,      .. help me pls.       (  )        ()
      
      ;
       
    = ("");
   .("");
   .("");
   ("  ...");
   .(0, 0, .(), 0);
    .(1) = 1 
         .("");
   ;
         .("");
      .(1);
      .("", "");
   



 ()
    , , ;
    = ("");
    = 
   "//{{()
   |    ;
   | ;
   | ;
   |1 = .., .., ..;
   | = ..;
   | = ..;
   |  = ();
   |  = ();
   |  = ();
   | 1   1.;
   |(1  1);
   |"//}}
   ;
    .() = 0 
      ;
   ;
    . (1,0,1);  
    = ("");
   .("");
   .("");
   ("  ...");
   .(0, 0, .(), 0);
    .(1) = 1 
      .("1");
   ;
      .("");
      .(1);
   .("", "");

